1)   SudokuMeister 1.2.2.1
SudokuMeister - play and solve Sudoku puzzles on your computer. It is very easy and comfortable to use and offers a lot of useful features like providing solution hints. You can save puzzles and exchange your favorite puzzles with your friends.

 2)   Prime Time: Math Adventure 1.1
Prime Time: Math Adventure is a math-based puzzle game that is actually FUN! Prime Time provides the benefits of educational software in a package enjoyable for both students and gamers. Try this gameplay demo to see how much fun math can be!